Fatai, Adrian and ops-dir:   This is an ops-directorate review.    Status of the document: Ready Reviewer: Susan Hares Editorial : Comments. Well written. IANA section: Good for IANA definitions Technical query: -           Where are the following constants defined: -           GC -           XRO -           LSPA -           BANDWIDTH -           RRO -           IRO -           LOAD-BALANCING   This text provides valid syntax definition.  However, I do not know if you wish to have text that spells out the abbreviations within this text.   This is a technical query where definitions are as a question:   Management considerations : Good   This document considers configuration and operational policy, information & data models;  Liveness detection and monitoring, validation of correct operations.  It provides instructions on interactions with other PCE functions, and a good summary of the impact.   Security: Good warnings on use.   Sue Hares shares at ndzh.com